Development of carbon deposits cleaning technique for metallic mirrors in HL-2A
Development of carbon deposits cleaning technique for metallic mirrors in HL-2A
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HL-2A金属镜积碳清洗技术开发
DOI：
10.1016/j.jnucmat.2010.12.009
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发表时间：
2011-08
影响因子：
3.1
通讯作者：
周艳
中科院分区：
文献类型：
--
作者：
周艳
为了开发从沉积碳膜中清洗容器内光学元件的有效技术，最近在实验室对HL-2A托卡马克第一镜的调q Nd:YAG激光清洗系统进行了测试。在HL-2A托卡马克中放置了多晶钼镜样品，并沉积了1μm的碳膜，验证了激光清洗技术的可行性。测试是在一个面积为20mm×20mm的Mo镜上进行的。通过多次脉冲重复空间扫描，碳沉积物几乎完全被清除。研究了激光清洗前后钼反射镜的反射特性。在1200-2500nm波长范围内，我们发现清洗后金属镜面的反射率恢复到~ 90%。
In order to develop effective techniques for the cleaning of in-vessel optical components from deposited carbon films, a Q-switched Nd:YAG laser cleaning system for HL-2A tokamak first mirrors has been tested in the laboratory recently. A polycrystalline molybdenum mirror sample exposed in HL-2A tokamak with a deposited carbon film of 1μm was used to demonstrate the feasibility of the proposed laser cleaning technique. The test was performed on a Mo mirror with an area of 20mm×20mm. The carbon deposits were almost completely removed by multiple pulses repeated spatial scans. Reflection of the Mo mirror was investigated before and after the laser cleaning. In the wavelength range of 1200–2500nm we found that the reflectivity of the metallic mirror was recovered to ∼90% after the cleaning procedure.
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